{"id":385,"date":"2018-03-06T12:47:43","date_gmt":"2018-03-06T17:47:43","guid":{"rendered":"https:\/\/cecas.clemson.edu\/~lonny\/?page_id=385"},"modified":"2024-05-22T20:42:07","modified_gmt":"2024-05-23T00:42:07","slug":"research-in-acoustics","status":"publish","type":"page","link":"https:\/\/cecas.clemson.edu\/~lonny\/research\/research-in-acoustics\/","title":{"rendered":"Research in Vibration and Acoustics"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Transient Acoustic Scattering using Adaptive Discontinuous Galerkin Finite Element Method<\/h3>\n\n\n\n<p><\/p>\n\n\n\n<p>Adaptive Discontinuous Galerkin Finite Element Method (DGFEM) scattered field solution from an ellipse in an unbounded region with corresponding adaptive mesh at snapshots in time. Waves are allowed to pass through the circular nonreflecting boundary, using the sequence of high-order accurate radiation conditions given in (L.L. Thompson, R. Huan, D. He, `Accurate radiation boundary conditions for the two-dimensional wave equation on unbounded domains,&#8217; Comput. Methods in Appl. Mech. Engrg, 191, 311-351, 2001). Initially, the scattered field is localized near the surface of the scatterer and then expands as the pulse progresses past an elliptic scatterer. As the wave propagates throughout the grid, elements are refined near wavefronts and unrefined where the solution is smooth or quiescent. This provides efficient real-time wave tracking over large distances and time.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Parallel Iterative Solution for Three-Dimensional Acoustic Scattering<\/h3>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;69e93fcb45965&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"69e93fcb45965\" class=\"wp-block-image wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"578\" height=\"433\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/cecas.clemson.edu\/~lonny\/wp-content\/uploads\/2018\/03\/contour3d-screen.gif\" alt=\"\" class=\"wp-image-400\"\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cecas.clemson.edu\/~lonny\/wp-content\/uploads\/2018\/03\/submarine3D-screen.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"670\" height=\"585\" src=\"https:\/\/cecas.clemson.edu\/~lonny\/wp-content\/uploads\/2018\/03\/submarine3D-screen.gif\" alt=\"\" class=\"wp-image-403\"\/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cecas.clemson.edu\/~lonny\/wp-content\/uploads\/2018\/03\/timings_halfsize.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"633\" height=\"481\" src=\"https:\/\/cecas.clemson.edu\/~lonny\/wp-content\/uploads\/2018\/03\/timings_halfsize.gif\" alt=\"\" class=\"wp-image-406\"\/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Transient Acoustic Scattering using Adaptive Discontinuous Galerkin Finite Element Method Adaptive Discontinuous Galerkin Finite Element Method (DGFEM) scattered field solution from an ellipse in an unbounded region with corresponding adaptive mesh at snapshots in time. Waves are allowed to pass through the circular nonreflecting boundary, using the sequence of high-order accurate radiation conditions given in &hellip; <a href=\"https:\/\/cecas.clemson.edu\/~lonny\/research\/research-in-acoustics\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Research in Vibration and Acoustics<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"parent":47,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-385","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/pages\/385","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/comments?post=385"}],"version-history":[{"count":8,"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/pages\/385\/revisions"}],"predecessor-version":[{"id":929,"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/pages\/385\/revisions\/929"}],"up":[{"embeddable":true,"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/pages\/47"}],"wp:attachment":[{"href":"https:\/\/cecas.clemson.edu\/~lonny\/wp-json\/wp\/v2\/media?parent=385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}